Zero eliminating means



May 6, 1941. C. D. LAKE ET AL 2,240,563

ZERO ELIMINATlNG MEANS Original Filed Aug. 3l, 1958 11 Sheets-Sheet 1ATTOR EY May 6, 1941.

c. D. LAKE ET Al. ZEROELIMINATING MEANS original Filed Aug.. 51, 1938ll/Illl1lIll/1llllllllll/l/ll/lllllll/lll/ll/lll//ll 11 Sheets-Sheet 2IIIA ATTORNEY May 6, 1941.

C. D. LAKE ET AL ZERO ELIMINATING MEANS original Filed Aug. 31, 1958 1lSheets-Sheet 3 ATTORNEY May e, 1941. C. D. LAKE ETAL 2,240,563

ZERO ELIMINATING MEANS Original Filed Aug. 341, 193B 1l Sheets-Sheet 4IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIlll'4 l' ATTORNEY May 6, 1941. C. DLAKE ETAL 2,240,563

l ZERO ELIMINATINGMEA'NS Original Filed Aug. 5l, 1938 ll Sheets--Shee'cl5 fwn/525225 ATTORNEY May 6, 1941.

C D. LAKE ETAL ZERO ELIMINATING MEANS 11' Sheecs-Sheet 6 original FiledAug. 31, 1938 @www 'l SYM May 6, 1941.

C. D. LAKE ET AL ZERO ELIMINATI'NG MEANS original Filed Aug. s1, ,1938

1l Sheets-Sheet '7 im f May 61 I A C. D. LAKE E'L ZERO ELIMINATING MEANSO rigin'al Filed Aug. 31, 1938 1l Sheets-Sheet 8 HGM-v `1 3'@ ATTORNEYMay 6, 1941. c. D. LAKE ET AL ZERO ELIMINATING MEANS original Filed Aug.51, 1938 11 sheets-sheet Q ATTORNEY und..

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May 6, 1.941- c. D. LAKE ETAL 2,240,563

ZEROl ELIMINAT ING MEANS originalvFned-.Aug 51, 1958 11 sheets-sheet, 1o

FIG. Z1

ATTORNEY May-6, 1941.

c. D. LAKE E-rffh.v ZERO ELLMINATING MEANs Original Filedv Aug. 3l, 1938l1 Sheets-Sheet l1 MMM AToRNEY Patented May 6, 1941 UNITED STATES PATENTOFFICE znno ELnvnNs'rING MEANS Clair D. Lake, Binghamton, and -FrancisE.

Hamilton, Endicott, N. Y., assignors to International Business MachinesCorp., New York, N. Y., a. corporation of New York Original applicationAugust 31, 1938,4Serial No.

1939,. Serial N0. 279,013

Claims. (Cl. IS7-20) This case relates to a. machine for automaticallytranscribing information derived from a and there are as many suchcolumns as the number of denominational orders of the highest numericalvalue which may be perforated into the numerical field. When the fieldis to be perforated with a numerical item having fewer denominationalorders than the number of columns, it is the practice to punch zerodesignations into those columns preceding the column bearing the rstsignificant gure.,

The object of the present invention is to provide novel meanstoeliminate the recording or transcribing of zero designations of anumerical card field preceding the first significant iigure designationof the eld.

More specically, this object includes the provision of means to preventthe analysis of zero designations preceding the I irst signicant figureof a numerical representation in the numerical card neld.

The transcribing apparatus with which the present invention isassociated comprises means controlled in succession by the numericaldesignations of the record card for recording on a record receivingsheet the digits of the number in succession. The invention contemplatesthe provision of means for preventing the zero digit desrecorded andinstead causing an intra-line spac- Y ing of -the record receiving sheetfor each of the card columns bearing a zero designation preceding therstsignicant gure.

The machine operates cyclically on the record cards, performing onecycle for each card. A stack or series of related record cards may havecorrespondingly 'located numerical iields. It is an object of theinvention to provide zero eliminating means which is automaticallyplaced in effect at the same time during'each of successive cycles ofoperation on suc-cessive record cards to Divided and this applicationJune 14,

prevent the recording of zeros preceding the rst .significant iiguredesignated in the numerical field of successive cards. Y

. The latter object may be stated as the provision of program means foreliminating the recording or transcribing of zeros preceding the firstsignificant digit of the number designated in columns of a numericalield of a series of records. Further, it is contemplated to provide suchprogram means as is set-table in accordance 'with differently locatednumerical card fields.

Other objects of the invention will be pointed out in the followingdescription and claims and illustrated in the accompanying drawings,which disclose, by way of example, the principle of the invention andthe best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a plan View of the machine with the control section uncovered;

Fig. 2 'is a section along 1ines 2-2 of Fig. 1;

Fig. 3 is a detail sectional view through a part of the card stackingunit of the control section taken-along lines 3-3 of Fig. 1;

Fig. 4 .is a detail view of part of the analyzer for the cards;

Fig. 5 is an enlarged plan view of the drive mechanism and part of thecontrol section;

Fig.; 6 is an enlarged side section through the transcribing unit, takenalong lines 6-6 of Fig. 1;

Fig. 7 is a. front, sectional; view of the translating portion of thetranscribing unit;

Fig. 8 isa top sectional view of the translating mechanism;

Fig. 9 is a front view of the upper four combs orf the translatingpdrtion; v

Fig. 1Q is a side section through the translating system taken alonglines lll-lll'vo'f Fig. 8;vv

Fig. 11 is adetail view of restoring means for the comb bars of thezoningor translating system;

Fig. 12 is a sectional view of planetary gearing forming part of thedrive mechanism taken along lines 'l2- I2 o f Fig. 5; Y

Fig. 13 is a. section along lines |3-I3 of Fig. 8

Fig. 14 is a detail plan View of switching meansin the recording' unitand controlled by the carriage return or tabular operating levers;

Fig. 15 is a detail plan view of contacts controlled by a left handmargin stop in the recording unit.

Fig. 16 is a plan section through the card cycle program drum and alsoshowing the associated contact means;

Fig. 17 is a side view of thecard cycle program drum and the zeroelimination contacts controlled thereby;

Fig. 18 is a detail side sectional View of the main clutch and itscontrol magnet;

Fig. 19 is a detail View of the clutch arm contacts;

Fig. 20 is a time chart of the card cycle;

Fig. 21 is a time chart of a zoning cycle with an indication of theaction of the card feed means during the zoning cycle;

Fig. 22 shows a tabulating card operated on by the machine and punchedwith the coded designations for the various functions, and;

Fig. 23 is the circuit diagram.

TH 1c TRANSCMBING UNi'r While the invention may make use of any suitablerecording unit, it is preferred, for illustrative purposes, to disclosethe invention herein in connection with a recording apparatus, thegeneral principles of which are disclosed in Patents Nos. 1,777,055 and1,873,512. Fig. 1 shows the arrangement of levers lll for causing theoperation of transcribing elements and related control devices. Theseveral levers I may be distinguished by appending to the generalreference character a supplementary reference character denoting theparticular function or operation controlled by the operating lever.Thus, levers III-A to Z, Il to 9, cause operation of transcribingelements to record characters A to Z, 0 to 9; lever IlJ--TAB controlstabulating operation; lever Ill-SH controls the case shift mechanism;lever II'I-CR controls the carriage return operation; and lever IU--SPcontrols the operation of intra-line spacing means.

Referring to Fig. 6, depression of a lever I0 releases a latch II from acam I2 permitting the cam to be forced by a lever I3 against aconstantly rotating friction shaft I4. The shaft rotates the cam,causing the carrier I of the cam to rock in a direction for depressingconnected link I6. This link, through a linkage I`I, propels a type barI8, mounted on type basket I9, against the sheet of paper P on theplaten 20, thereby typing the character corresponding to thedepressedlever I0. During the end `of the stroke of type bar I8, itstrikes a universal bar 22 to actuate the escapement control 23 foreffecting a character or intra-line spacing operation of the carriage24. Operation of the space lever IO-SP acts through associated elementsII, I2, I3, I5', and I 6 to operate a linkage 25 for actuatingescapement control 23 also to cause an intra-line spacing operation ofcarriage 24.

A special, normally closed switch 28 (Fig. 14) is located at the rear ofthe recording unit. The long, spring blade of this switch is engagedwith a roller 30, of insulating material, carried by one arm of a lever3l. This lever is the back-space interlock, which as described in Patent1,873,553 is rocked by the escapement pawl release lever 32 While thecarriage is tabulating. Lever 32 is also actuated during line space orcarriage return operationto rock back-space interlock lever 3|, asdescribed in above-mentioned Patent 1,955,614. When lever 3l is rocked,its roller 3D opens switch 28, which remains open until the completionof either'the carriage return or the tabulating operation, whichever istaking place. The purpose of switch 28 will be explained hereinafter, inconnection with the circuits.

Another special, normally closed ,switch 33 is provided LFig. at therear of the recording unit, which is opened when an insulating tab 33aon its long, spring blade 33D is engaged by the special extension 34a ofthe settablc beginning of the line margin stop 34. The purpose of switch33 will be explained in connection with the circuits.

lhceom) CARD ANI) Com;

The record card T, as indicated in Fig. 22, has eighty designationcolumns, each with twelve index points or perforation-receivingpositions known as the 9, 3 I, (l, II, and I2 positions, andperforations in which are known as the 9, 8 I, 0, II, and I2perforations.

The columns of a card T are perforated according to the information tobe listed or transcribed under control of the card, and the variouscodes designating the information are shown in Fig. 22. The codes may beconsidered as divided into several zones. The single point Zone includessingle perforations in any of the 9, 8 I, 0, II, and I2 positions of acard column. The 9, 8 I, I)

perforations in this zone represent, respectively, these several digits,the I I perforation represents a tabular operation, and the I2perforation represents a carriage return operation. The I2 zonecomprises a common I2 perforation plus one of the perforations I to 9,representing letters A to I. The II zone comprises the common IIperforation plus one of the I to 9 perforations, representing letters Jto R. The II zone comprises the common D perforation accompanied by a 2to 9 perforation, representing letters S to Z. The II-I2 zone comprisescommon iI-I2 perforations plus a I to I perforation, representingdifferent symbols. The II-I2 code alone represents a high speed (H. S.)eject operation to be controlled by the card. In each combination holecode, the common zone perforation or perforations may be referred to asthe zone distinguishing perforation, point, or characteristic. In thesingle point zone, the imperforate portion of the column may beconsidered as the zone characteristie. The character or functiondistinguishing points of each zone are the I to 9 perforations which maybe referred to as the intrazone points or-characteristics.

Dmvr: MECHANisir Referring to Figs. 1 and 5, the drive mechanismincludes a motor 35. Motor 35 through a coupling 36 rotates a pinion 3lwhich drives a gear 38 on a shaft 39 carrying a worm 40. Worm 4I) mesheswith a warm wheel 42 on a sleeve shaft 43 rotatably mounted on a shaft44.

Main clutch.-One end of the sleeve shaft 43 is provided with a drivingclutch ratchet 45 (also see Fig. 18) having four teeth, ninety degreesapart. Fixed to shaft 44, adjacent driving ratchet 45, is a plate 4Bformed with four equally 'spaced notches 46a ninety degrees apart.Loosely carried by shaft 44, adjacent plate 46, is a cam disk 41 withfour cam teeth 41a, each adiacent one notch 46. Plate 46 pivotallycarries a clutch pawl 48 having an intermediate tooth 48a to engage atooth of driving ratchet 45. The free end of pawl 48 carries a stud 48Dpassing through a hole 4Gb in plate 46. Adjacent stud 48h, pawl 48 has apin 48e connected by a spring 49 to a pin 46c on plate 46. rIhe springtends to move pawl 48 inwardly to engage its tooth 48a with a-tooth ofdriving ratchet 45, but this action is prevented while the high camportion of a tooth 41a of disk 4'I is engaging stud 48h of the pawl. Thedisk 4'I is held in such a declutching position by engagement of the natside of one of its teeth 41a with the nose of a latch arm 50 fixed toone end of a shaft which at the opposite end carries the armature lever52 of main clutch magnet 53. The lower, free end of armature lever 52 islocated between a pair of adjustable stop screws 54 which limit theretracted and attracted positions of the armature lever, its shaft 5|and latch arm 50. A spring 55 connected to armature lever 52 and aspring 56 connected to latch arm 50 combine to hold the armature leverin retracted position, with the latch arm in position to engage a toothof disk 41. Spring 56 connects arm 50 to an impositive latch arm 51provided with a roller 51a ridingl on the periphery of disk 46, andadapted to enter a notch 46a of plate 46 to detain, impositively,

-this plate in one of the four positions, ninety degrees apart, at whichthe declutching takes effect. Arm 51 is fast to shaft 58. which carriesa dependent" arm 59V. (Fig. 19) located between the adjacentspringblades 60 and 6| of a pair of switches 62 and 63 tending to open. Whenarm. 51a is seated in a notch 46a, switch 62 is closed and switch 63open. These switches may be referred to as the clutch arm contacts.During rotation of disk- 46, arm 51 will be cammed out of notch 46a,causing arm 59 to close switch 63 and permit switch 62 to open. The arm51 will move into a notch 46a every ninety degrees` of rotation of plate46, intermittently closing switch 62 and opening switch 63.

When main clutch magnet 53 is energized, it rocks armature lever 52,shaft 5|, and latch arm 50 counterclockwise (Fig. 18). withdraws from anarm 41a, releasing cam disk 41 and enabling spring 49 to move stud 48hinwardly. The stud acts against the curved cam side of a tooth 41a ofdisk 41 to rock the disk clockwise, bringing the tooth 41a, previouslyengaged by arm 5 0 below the nose of the latter. As pawl 46 was rockedinwardly by spring 49, its clutching tooth 48a engaged with a tooth ofdriving ratchet 45, thereby-coupling the driven shaft 44 to the sleeveshaft 43 of the ratchet. With pawl 48 in its inner, clutching position,stud 48h thereof is seated in the crotchv between two teeth of camv disk41, forcing the latter disk to rotate with the pawl. Upon deenergizationof main clutch magnet 53, latch 50 intercepts one of the four teeth ofdisk 41, rocking the latter to cam the pawl 48 out of clutchingengagement with ratchet 45. Referring to Figs, 5 and 1,2, driven shaft44 rigidly carries a pinion 65, meshed with three sun gears 66Vrotatably carried by the three arms of a carrier 61 which'is fixed atits center to the reduced end of the hub sleeve 68a of a normallystationary disk 68. With disk 68 stationary, carrier 61 is at rest, andsun gears 66 are capable only of a simple rotation by pinion 65. Rigidwith each gear 66 is a pinion 69 meshed with a gear fast to oneend of asleeve 1| surrounding shaft 44. To the opposite'end of the sleeve 1| isfast a pair of gears 12 and 13. With shaft 44 coupled, as previously eX-plained, to driving ratchet 45 for rotation, and with driven clutch disk68 held against move- Ament, pinion 65 of shaft 44 actuates gearing 66,

69, 10, 12, and 13 as a simple train of gearing.

speed.

Gears 12 and 13 on shaft. 1| drive elements of the control sectionincluding card feed means which wil1`be described later. During normalspeed operation of these gears,`Y the card is fed at a speed such thatone column thereof traverses a given reference line during one-quarterturn of 75 The latch arm- Gears 12 and 13 then rotateV at normal I mainclutch shaft 44. The period of such travel of a card column is equal tobut not coincident with one cycle point of the card cycle indicated inFig. 20. The card cycle may be considered as the interval betweenarrival at a reference line of similar points of successive cards.During eighty points of the card cycle, the eighty card columns of acard traverse analyzing means described subsequently. A gap of ten cyclepoints then occurs before the next card cycle begins on the next card.

Zoning cycle commutators-.Shaft 39 (Fig. 5) is driven continuously bythe motor and carries commutators HS (also see Fig. 2 1) which may bereferred to as the zoning cycle commutators. The speed of shaft 39 isfour times that of main clutch shaft 44, so that one revolution of thisshaft, as well as of its commutators HS corresponds to a quarter turn ofshaft '44, which in turn corresponds, during normal card feed, to onecard cycle point, as explained before. The revolution of shaft 39 may bereferred to as the zoning-cycle (Fig. 21) which during normal card feed,is equivalent to one card cycle point.

Shaft 39 also carries a zoning cycle index wheel ||0 to index the zoningcycle positions of shaft 39 and the elementactuated thereby.

To the left end (Fig. 1) of shaft 39 is fixed a bevel gear ||2 whichmeshes with a bevel gear ||3 on a downwardly inclined shaft ||5.

Drive for zoning unit-Shaft ||5 at its lower end has a bevel gear ||1meshed with a bevel gear |I8 on a horizontal shaft ||9 (see Figs. l, 2,and '7) Shaft ||9 is provided with a. pin 20 seated in the bayonet slot|2| of a sleeve coupling |22 mounted on the shaft. In line with shaft|I9 is a shaft |23 which has a transverse, coupling pin |23a (Fig. 7)slidable into the open, end slots|22a of coupling |22. A spring |24urges coupling |22 towards the left (Figs. 2 and '7) for maintaining therear end of the horizontal portion of the bayonet slot |2| in engagementwith pin |20, In this position, as indicated in Fig. 7, the slots |22aof the coupling sleeve 22 are receiving the pin |23a, thereby couplingshafts ||9 and |23 for common rotation. To uncouple shaft |23 `fromshaft ||9, coupling sleeve |22 is forced rearwardly until pin |2| is atthe vertical portion of the bayonet slot, withdrawing slots |22a frompin |23a, and then the coupling sleeve is rotated to engage the pin |20in the vertical portion of the bayonet slot, thereby maintainingthecoupling sleeve in rear, release position.

The main parts' of the actuating mechanism have now been explained.v Theunits of the machine driven thereby, the control section and the codetranslating or zoning unit will be explained in order,

The control section (card handling section)l |28. This dis/k |30 issuitably graduated to indicate the card cycle, and may be referred to asthe card cycle indicator.

Card zn'clcer Leuna-Referring to Fig. 2, shaft |29 carries complementarycams i3! for engaging rollers |32 and |32 provided on opposite arms of alever |33, Lever |33 is 4connected by a link |34 to a picker slide |35provided at the rear with a picker knife |35' for engaging the rear edgeof the bottom card T of' the stack of cards in supply magazine |36. 'Ihecards are stacked in magazine |36 in the predetermined order in whichtheir data are to be listed, and the cards lie lengthwise in themagazine, with the columns extending crosswise. During each card cycleor revolution of shaft |29, its cams |3|, acting through lever |33, link|34, and slide |35, reciprocate the picker knife |35' to feed the bottomcard out of the magazine |36 and into the grip of upper and lower feedrollers |31 and |38. Since shaft |29 makes one revolution each cardcycle, one card is fed to feed rollers |31 and |38 each card cycle. f

Card cycle program merma-One end of card cycle shaft |29 fixedly carriesa driver |43 (see Figs. 1, 16, and 1'1) having a pair of spaced studs|43a vand |43b to t into holes in the side of a card cycle program drum|44. The studs are of different sizes and their receiving holes are ofcorresponding sizes, so as to permit the drum to be placed'on the driverin predetermined relation thereto. The hub of driver |43 is hollow torotatably and sldably receive the shank of a hand knob |45, urgedinwardly towards the side of drum |44 by a coil spring |46 inside thehub of the driver. Hand knob |45 is provided with -a clamping block |45'rectangular in shape, adapt'- ed to move through a similarly shaped hole|44' in the program drum. By turning the knob |45 to aline block |45wit-h hole |44', the drum |44 is left free to be removed from driver|43. By turning the knob to bring its plate |45 at right angles to hole|44 (as indicated in Fig. 1'1) the block |45', under the influence ofspring |46, firmly clamps the drum to driver |43.

In above manner, card cycle program drum |44 is rigidly but removablycoupled to shaft |29 fer one revolution each card cycle.

Drum |44 is constructed similarly to a spool with side flanges |44a.Each flange is similarly provided with ninety, equally spaced, radialslots |44b. There are ninety points in a card cycle (see Fig. 20), sothat each of the ninety slots |4417 corresponds to a definite point ofthe card cycle. 'I'he slots are numbered to indicate the points of thecycle to which they correspond. Each of flanges |44a is formed below thenotches |44b with an inwardly extending annular bead |44c. Each of thenotches |441) is designed to insertibly receive a Spring Clip |47- EaChClip iS generally U-shaped with the legs |41a bent in the form ofangles, with the intermediate portions |41b projecting outwardly beyondthe legs, and with the cross piece or head |41c connecting the spacedintermediate portions and legs. To place a clip on the drum flanges|44a, the legs of the clip are pinched together to enable them to beinserted between the flanges with the apexes of the leg angles locatedbelow beads |440. As the clip is inserted, the intermediate portion |41bmoves into the selected alined slots |44b of the two flanges, with thehead |41c extending across the flanges and between the allned slots. Thelegs of the clip, after insertion, tend to spread, thereby gripping theinsides of the flanges, while the beads |44c engage the leg angles toprevent radially outward movement of the clipl Since the intermediateportion |4113 o! the clip is seated in the alined slots |441), the

clip is held against circumferential movement. Thus, clips |41 may beinserted on the drum 44 at desired points corresponding to points of thecard cycle.

Adjacent drum 44 is a subframe |48 mounting a shaft |54 rotatablycarrying a pinion |68. The forward, hook end of a spring blade |18 isseated between the teeth of pinion |68 and is below 'a companion blade|1|, the blades carrying contacts |12 between them. When a head of clip|41 rides past pinion |68, it imparts an eighth turn thereto, rotatingit a single tooth distance, As pinion |68 rotates, a tooth thereoftransiently lifts blade |18, closing contacts 12 momentarily. Contacts|12 are the zero elimination contacts, which, in a manner to beexplained later in connection with the circuit, eliminate the readingout and printing of zero designations from columns of a numerical cardfield preceding the column bearing the first significant digit 1 to 9.

Card feed rolls and analy2er.-Gear 12 of the clutch-driven shaft 1|meshes with a gear |15 on the shaft of lower card feed roller |38 (seeFigs. 1, 2, and 4). The shaft of the lower roller has a gear |16 meshedwith a gear |11 on the shaft of upper feed roller |31, so that the upperand lower feed rollers rotate in unison. As previously described, pickerblade |35' feeds a card T out .of supply magazine |36 and into the gripof feed rollers |31 and |38 each card cycle. The feed rollers continuethe feed of the card moving it at the rate of one column each cyclepoint.

Between the mouth of the supply magazine and feed rollers |31 and |38 isarranged a. card lever |18 (Fig. 2) which is engaged and cammed down bythe card traveling to the feed rollers, for closing card lever contacts|19 during travel of the card.

Upper feed roller |31 is a conductive roller acting as the common of thecard analyzing means. Coacting with roller |31 are thirteen sensingbrushes SB-S to 8, i2, and c, to respectively sense index positions 8 to8, and i2 of a card column, while brush SB-c acts as a common returnbrush, being located to the side of the card and in constant engagementwith roller |31 (see Fig. 4) Lower feed roller |38 is grooved s0 as tohold the free ends of the brushes in predetermined transverse spacing,and enable the brushes to extend substantially intangential engagementwith the lowest part of the feed and contact roller |31 in order tosense the card.

Thev labove described card sensing means. SB`|I31, analyzes theperforations of the card columns insuccession, one column after another,to control the decoding, interpreting, or zoning system to be describedlater.

Card smeken-As a card is fed by the rollers |31 and |38 past theanalyzing means, it moves underneath a flexible plate |88, supported. atthe rear end, underneath a weighted plate |8| pivoted at its rear end,and into delivery magazine |82. Both plates' |88 and 8| are cut out to.permit a soft rubber arm |83 to rotate through and past the plates, soas to wipe the card and complete its ejection into the deliverymagazine. Arm |83 is carried by a shaft |84 on which is a gear |85,driven through gears |86, |81, and |88 from gear |15 on the lower feedroll'shaft. The gear ratio is such that arm |83 makes one revolutioneach card cycle to complete the ejection of the card analyzed duringthis cycle.

The stack of ejected cards in delivery magazine |82 rests on a bottomplate |98 hinged at its front end on a pivot I9I To the bottom of plate|98 is fast a bracket |92, passing through a slot |93 in the side wallof the magazine and rigidly provided outside the latter wall with a racksector |94. Sector |94 meshes with a gear |95 (see Figs. 2 and 3)coacting with a. horizontal rack |98l provided on a sleeve |91 whichslides inside a xed tube |98. The rack |98 passes through a narrow slotin tube |98, preventing rotation of the sleeve |91. Between tube |98 andsleeve .|91 is a coil spring |99 tending vto move the sleeve to the left(Fig. 3). With no cards on plate |99, spring |99 is-holding sleeve |91at its left hand limit. As the cards stack up on plate i90, their weightdepresses rack sector |94 which, through gear E95 and rack |98, causessleeve |91 to move to the right, against resistance of spring |99. Whenthe delivery magazine is full, the weight of the stack has moved bottomplate |90 downwardly to an extent suilicient to engage the lower edge ofbracket |92 with an insulating tab 209'xed to the lower blade 20| of aswitch 293, thereby opening such switch to interrupt operation of thecard feed unit, in a manner which will be explained later.

Zoning unit The zoning unit includes twelve horizontal,`

parallel combination or comb bars 2I0, disposed one above another, andlocated at a distance below the typewriter keyboard, as indicated inFigs. 6, l0, and 13. Each comb bar corresponds to an index position of acard column and may be dls-. tinguished by referring to it as the combbar of the correspondingly termed index position. Thus,

bars 2|09, 8 I, 0, II. I2 correspond to index positions 9, 8 I, 0, II,I2, and their positions are indicated in Fig. 13.

, Each of the comb bars 2I|l is formed with front lugs 2I0a arranged forcombination with lugs of the other combs in governing interpretation ofa perforated designation code. Each comb also has a single rear lug2I9b, and the lugs 2I0b of the several combs are staggered horizontallyto enable each lug to be engaged by the free end of one of the twelvestaggered armature levers'2l I, as indicated in Figs. 6 and 8. Eacharmature lever 2| is operated by one of the twelve zone magnets 2|2,arranged in two horizontal layersand staggered to enable the armaturelevers to dispose their free ends in engagement with the staggered lugs2I0b of the several combs 2|0. A pair of opposite. end guide combs 2|3and a central guide comb 2H (Fig. 7) guide the combs 2I9 forhorizontally slidable movement. A spring 2| 8 connected to each comb 2II), urges vthe latter towards the left to a normal position, determinedby engagement of a screw 2I8 (Figs. 6 and 8) carried by the armature 2IIwith' the frame plate 2I1.

Upon energization of a. zone 'magnet 2I2, it rocks its armature lever2II counterclockwise (Fig. 8). causing the armature lever; by engage-'ment with the associated lug 2| 8b, to shift the corresponding comb bar2|9 to the right.

Extending in front of the )combs 2 I8 are a plulrality of spacedvertical levers 2I8 urged towards the combs by springs 2| 9. The lowertip of. each lever follows a cam 228 extending across allthe levers andxed to shaft |23. As previously explained under the heading Drivemechanism,

shaft' |23 is continuously rotated, through a coupling |27.. frommotor-driven continuously rotating shaft II9. Shaft I 23 makes onerevolution each zoning cycle- (Fig. 21),- and during normal card feed,one zoning cycle corresponds to a card cycle point.- Once each zoningcycle, cam 228 releases levers 2I8 for forward movement. by springs 2 I9. During each zoning cycle occurring between 1 and 80 of the card cycle(see Fig. 20) vduring normal card feed, a column code analyzing periodis provided during which analyzing means SB-l 31 is effective to analyzeone card column for a designation or code. vIn accordance with theanalysis, selected combs 2I8 are shifted to the right, to displace theirfront comb lugs 2I0a from in front of the lever 2I8 corresponding to thecharacter or function represented by the analyzed perforated code in theactive card column. There will be no other lugs 2|0a in front of thelatter lever 2I8 but one or more lugs remain in front of the rest of thelevers 2I8. Accordingly, when cam 220 releases levers 2 I8 for inwardmovement, only one of these levers is enabled to move inwardly to asulcient extent to bring the shoulder 2I8a of the lever above a commonlift bail 22|. Bail 22| extends across all the levers 2I8 and isprovided with rollers 222 at leach side following cams 223 xed to zoningcycle shaft |23. Thus, for each cycle point or analysis of one cardcolumn, bail 22| is given one reciprocation. During the rise of thebail, by engagement with the shoulder 2 |8a of that vertical lever 2I8which has been released by the combs 2I0, the bail lifts the lever.

The upper end of eachlever 2I8 is pivotally connected to a lever 224urged counterclockwise (Figs. 6 and 13) by a spring 225 and pivoted to alink 228. Each link 228 is provided at its upper end with a stud 228afreely passing through a vertically elongated slot 221 in an associatedone of the horizontal, operating levers I9 of the transscribing unit. Toyieldably and releasably maintain the side of link 228 firmly againstthe side of the associated lever I8 and prevent accidental withdrawal ofstud 228cv, a nat spring 228 is xed to the side of each link 221, thespring and link engaging the associated lever l0 between them. When thelever 2I8, which has been selected by combs 2I8, islifted by bail 22|,it rocks lever 224 clockwise (Fig. 6) against resistance of spring 225,thereby lowering link 228 to depress the corresponding operating leverI. Depression of the lever [Il effects the recording or other functionof the transcribing unit, as denoted by the code in the analyzed cardcolumn.

As indicated in Fig. 9, the combs 2 I8 have front lugs 2|8sp. The lugs2I||sp of the twelve combs are in vertical alnement and located directlyto the left (Figs. 'I and 8) ofthe vertical lever 2|8sp. No matter whichcode combination is sensed on a card T, at least one of the combs 2I|Iwill be moved te the right, thereby placing its lug zum4 lever I8-SP.Thus, when any code is sensed and interpreted, causing actuation of oneor more of the combs 2 I 9, lever 2 I8sp will be blocked againstoperation, permitting the intra-line spacing of the carriage 2| (seeFig. 6) to occur only as the usual incident to the operation of thelever i8 corresponding to the character whose designation has been foundin the analyzed card column.

When the card column traversing the analyzing means is blank, Vthen an'operation of intra-line space lever ID--SP is indicated. Thus, failureto sense any perforation in a card column leaves all the combs 2I||jintheir normal positions, with all the lugs 2I8sp out of the path of lever2I8sp which thereby vis enabled to move forward to cooperate with liftbail 22| for operating space lever |-SP to effect an intraline spacingofthe carriage 24.

During certain operations, including carriage return or line spaceoperation, for the period of each cycle between the departure of onecard from the analyzing means and the arrival of the next card, and,whenever main clutch shaft 44 is at rest, none of the combs ZID. isactuated. Accordingly, operation of intra-line space lever IO-SP wouldbe effected, undesirably, under control of operating lever 2|Bsp eachcycle of shaft |23, unless provision were made to the contrary. To lockout the operating lever 2 lsp under the above conditions, a space lockmagnet 230 (Figs. 8 and 13) is provided, energization of which rocks itsarmature 23| downwardly to rock a lever 232 clockwise (Fig. 13) againstresistance of a spring similar to spring 225. Pivotally suspended fromlever 232 is a lock arm 233 urged towards the right (Fig. 13) by aspring similar to spring 2|9. The lower end of arm 233 is formed with abent lug 233e, from an intermediate portion of which a tab 233b projectsparallel to the side of arm 233. The inward movement of arm 233 islimited by engagement of tab 2332 thereof (see also Fig. 8) with thefront of the bottom guide comb 234 of the operating levers 2|8. Thus,upon clockwise rocking of lever 232, effected by armature 23| uponenergizatlon of magnet 230, lock arm 233 will be moved verticallyupward. The outer, reduced end of lug 233:1. of arm 233 overlapsoperating lever 2|8sp and normally lies against the back of the lever,entirely below and out of a notch 2|8'sp formed on the space operatinglever (see Fig. 13). When lock arm 233 is lifted as a result ofenergization of magnet 230, lug 233 moves upwardly into notch 2|8'sp,thereby locking lever 2|8sp against inward movement. Thus, even thoughnone of combs 2|0 is actuated, if magnet 230 is energized, it will causelocking of the space bar operating lever 2|8sp.

To time the impulses to space lock magnet 230 for each column or cyclepoint, a switch 235 is provided which is closed by lift bail 22| whenthe bail is in lower position and which opens when bail 22| rises. Sincebail 22| is given one reciprocation each cycle point, switch 235 willopen and close once for each cycle point. It is to be understood,however, that switch 235 does not, of itself, close the circuit ofmagnet 230. The latter circuit will be traced hereinafter.

A 12 perforation occurring alone in a card column indicates a carriagereturn operation, and analysis of this perforation energizes the magnet2|2 of comb `ZID-l2. When comb 2|0|2 alone is operated, the carriagereturn lever 2|8CR, (Figs. 7, 8, and 10) is released for coaction withlift bail 22|. As lever 2|8CR is lifted by ball 22|, it rocks theconnected lever 224 counterclockwise (Fig. Due to the operation of lever2| BCR, the carriage return operating lever lll-CR (Figs. 1 and 7) isdepressed to effect a carriage return operation of the carriage 24(Figs. 1 and 6), and as an incident to the carriage return, a linespacing operation occurs, as usual.

Towards the latterpart of the revolution of shaft |23 of thezoningsystem, a cam 250 thereof (Figs. 7. 8, and 10) effects clockwiserocking (Fig. 10) of a lever 25|. The upper end of lever 25| bearsagainst the arm 252:1 of a knock-off bail 252 (also see Fig. 11)', whichhas an arm 252b extending vertically across the right hand Themechanical features of the zoning system' have been explained above.Further explanation of its operation will be given as an incident to thedescription of the circuits hereinafter.

CIRCUITS, TIMING, AND OPERATION Referring to Fig. 23, with main lineswitch SW closed, motor 35 is set in operation, the circuit thereforgoing through safety contacts |4|.

In the following description, it is assumed the parts are initially in 0cycle position of the card cycle (see Fig. 20).

Having brought the first line of a bill form to printing position onplaten 20 of the recording unit, and having placed the stack of cards 'Ibearing the data for the bills in supply magazine |36, the operator maynow start operations by depressing the start key to close start keycontacts ST, forming the following circuit (middle of Fig. 23)

Start key circuit.-Fiom the left side, through contacts ST, normallyclosed relay contacts R-|lb, relay coil R-l, to the right side.

Due to energization of coil R--l by the Start key circuit, relaycontacts R-lb are closed to form the following main clutch circuit(bottom of Fig. 23)

Main clutch magnet circuit-From the left side, through normally closedrecorder unit contacts 28 (also see Fig. 14), normally closed relaycontacts R-3b, now-closed relay contacts R-Tb,

normally closed relay contacts R--22b, R-Ilc, jumper wire 623, normallyclosed relay contacts R-|0b, main clutch magnet 53 (also see' Fig. 5),and to the right side.

With main clutch magnet 53 energized, shaft 1| is now acting throughgears 'l2- and 13 to actuate the card feeding means. At the 0 cyclepoint, picker |35 (see Fig. 2) is in advanced position, ready to'beginits return stroke (see Fig. 20). As the machine is now set in operationfor the first card cycle, the picker is moved through its return stroke,and at the end of this stroke, at about the 64th cycle point, the pickeris at the rear of the bottom card T in magazine I 36 (see Fig. 2). Thepicker then dwells until about 70 of the card cycle at which point itbegins its forward stroke to'feed the bottom card to the feed rollers|31 and |38.

'I'he perforation field or width of the first card column or column 1 ofthe card reaches the line of sensing brushes SB shortly before the lcycle point of the card cycle, between the th and 90th divisions of the0 cycle point, as indicated by the upper, Card brush timing line, in thezoning cycle chart, Fig. 21. The "Card brush line indicates the periodsof sensing of perforations in successive card columns by brushes SB.Between 0 and 55 of one zoning cycle, the major, latter portion of ahole in one column is sensed and during this period, commutator HS-I ismade, so as to render thesensing effective to perform an analysis, aswill be further explained hereinafter. After this effective analyzingperiod of one card column during one zoning cycle, the

brushes SB sense, between 85 and-the end of the zoning cycle, thebeginning of the perforation of. the next column, but with HS-I broken,this sensing-is not effective to perform an analysis.

During the first card cycle Fig. 20) the picker started moving the iirstcard out of magazine |36 and to feed rolls |31'and |38. During itstravel to the feed Irolls, the card engages card lever |18 and cams itdown to close card lever contacts |19 (Fig. 2) after the beginning `ofthe 82nd cycle point. Closure of contacts |19 establishes the followingcircuit (top of Fig. 23)

Card lever circuit-From the left side, through contacts |19, relay coilsR| and R2, to the right side.

The operator need only hold the start key de- -pressed until the firstcard enters the feed rolls |31 and |38, since by then card levercontacts |19 have closed, and the Card lever circuit has beenestablished to energize coils R-I and Rf-2. Coil `lit-2 now has closedcontacts Rf-2b to shunt start key contacts ST through the followingcir#- cuit:

Start key shunt circuit- From the left side, through relay contactsR-2b, stop key contacts SK, stacker contacts 203 (also see Fig. 2),stick contacts R-1a of previously energized relay coil R-1, the relaycoil, and'to the right side.

Relay coil R-1 now remains energized until either the cards areexhausted from supply magazine |36, causing the card lever contacts |19to open and eventually deenergize coil Rf-2 with consequent opening ofcontacts R-2b, or upon depression, at will, of the stop key to opencon-'- tacts SK, or when the stacker magazine |82 is full, causingcontacts 293 to open.

There is a gap between successive cards feeding from magazine |36, andthe lagging edge ofthe leading card will leave card lever |18 and permitcard lever contacts |19 to open at 78" 'of the card cycle, while theforward edge of the following card will not cause contacts I 19 to malkeagain till after 82" of the same card cycle. To maintain coils Rf-I andRf-2 energized during this open interval of card lever contacts |19,commutator CF-I makes (see Fig. 20), shunting con-E tacts |19 throughthe following path (the top of Fig. 23)

Card lever shunt-From the left side, through commutator CF-I, stickcontacts R-Ia, coils R-|, R-2, to the right side.

`If the stack of cards is exhausted, contacts |19 will not have beenreclosed and when commutator CF-4 breaks at 84" of the card cycle, coilsR-I and R-2 will be deenergized. Contacts R-2b will open and the Startkey shunt circuit will break to deenergize coil Rf-1. As a result,contacts -1b will open to break the Main clutch magnet circuit. Mainclutch magnet 53 remains energized, however, till the end of the cardcycle vthrough a shunt circuit formed through commutator (IF-5 (see Fig.20), which makes at 82 and opens at 8.9. The making of commutator CF-Sshunts contacts 28, R-3b. R-1b, R-22b, R-'|4c, and Rf-Ilb of the Mainclutch magnet circuit, permitting clutch magnet .53 to remain in eiectuntil the beginning of the 89th cycle point. The main clutch isuncouplcd as a result, at the 80th division (see Fig. 21) of the 89thcycle point.

The analyzing or card reading period of a card cycle is indicated by thetop line of Fig. 20 and extends from 1. through, 80, during whichperiod, the Card read commutator CF-l is made.

'I'he Card lever circuit has energized coillR-I to .close contacts R|b,forming the following Coil R-9 now closes the left side of .transfer`contacts R-Sb (near the top, right of Fig. 23) and opens the right sideof these transfer contacts. 'I'his condition of the contacts R-9bendures through the card reading period under control of commutator CF-Iand is repeated every Acard cycle as long as cards continue to feed and,

through the card lever circuit; maintain relay coil R-I energized tohold contacts R-Ib closed in the coil R-S circuit.

As -an example of an analyzing circuit, assume a 12" perforation isbeing analyzed, forming the following circuit:

12 analysis- From the left side, through commutator CF|, contacts R-Ib,zoning commutator HS-I (see Fig. 21) normally closed contacts R-IBb,clutch arm contacts 63 (see Fig. 19 for construction and Fig. 21 fortiming), common brush SB-c, contact roll |31, brush SB-I2, the left andnow-closed side of transfer contacts R-9b, through the 12" comb magnet2|2, and through relay coils Rf-B and R-4, to the right side.

As indicated by above analyzing circuit and by reference to the cardcycle chart, Fig. 20, commutator CF-l times the card reading period, so

that after the 80th or last card column has passed brushes SB, theengagement of the brushes with the bare contact roll |31 will beineffective to form any analyzing circuits.

When the main clutch is at rest, clutch arm contacts 6 3 are open toprevent formationof any I (Fig. 8).

follows:

of the analyzing circuits.

Comb magnet 2|2-|2, upon energization, shifts its associated combbarJIU-IZ to the right When the analyzing means senses one of theperforations 9 to I, the analyzing circuit is as Digit or intraaoneanalysisLFrom the left side, through CF-I, R.-|b, HS-l, R|3b, 63, brushSB-c, common roller |31, the active one of the brushes SB-I to 3 sensingthe interzone perforation 2 8, or 9, the comb magnet 2|2 in series withthe active brush, and through common relay coils Rf-S and R|6 to theright side.

If a column contains a zone perforation plus one of the intrazoneperforations to 9, designating an alphabetic character, a pair of combmagnets 2|2 is simultaneously energized, moving two combs 2||| to theright (Figs. 7 and 8), in readiness'to release the lever 2|8corresponding to the alphabetic character denoted by the sensedV zoneand intrazone holes in the card column. If only one perforation 0 to 9occurs in a column,

indicating a digit, only one comb magnet 2|2 is energized and theassociated comb 2|2 moved lto the right ready to release the lever 2| 8corresponding to the analyzed digit perforation. The forward movement ofthe selected lever 2|8 does not occur-until cam 229 (Figs. 6, 10, and13) permits the levers to drop olf the high point of the cam. Thisoccurs shortly before f20 of the zoning cycle (Fig. 21). Before analysisof the column designation and resulting displacement of selected combs2|0, the leverv 2|8 corresponding to this designation is in front onlyof lugs 2|Ua (Fig. 9) of these combs. 'I'he displacement of these combsremoves their lugs from in front of the lever 2|8' corresponding to theanalyzed designation, thus selecting this lever for operation. There isat least one lug 2 (la in front of every other lever 2|8. W'hen cam22D're1eascs levers 2|8, they move forward to sense comb lugs 2||Ja (seeFig. 9). All the levers 2l8 will be stopped by the comb lugs with theexception of the selected lever which corresponds to the ana lyzedcharacter. This selected lever moves forwardly between lugs 2|Daof thecombs, thereby locating its shoulder 2|8a above lift bail 22| (Figs. 10and 13). At about 24" of the zoning cycle, circuit breaker HS-|, whichtimes the duration of the analysis of a column perforation, opens andbreaks the analyzing circuits to deenergize the comb magnets 2|2.Springs 2|5 (Figs. 7 and 8) now tend to return the previously actuatedcombs ZID but this is prevented at this time by engagement of sides oflugs 2|0 thereof with the selected lever 2|8 which has moved forwardlybetween these lugs. v

At 50 of the zoning cycle, lift bai1 22| rises and by engagementwithshoulder 2|8a of the forwardly positioned, selected lever 2|8, liftsthe latter to operate the associated lever I0 for causing a type bar I8(see Fig. 6) to strike platen 20 at about 81" of the zoning cycle torecord the character corresponding to the analyzed designation. At 90 ofthe zoning cycle, cam 220 has withdrawn the selected lever 2 I8 from allthe lugs 2|0a of combs 2|||, thus releasing the previously actuatedcombs for restoration by their springs 2|5. Shortly thereafter, at about95 of the zoning cycle, cam 251| (Figs. 7 and 10) operates lever 25| tocause bail 252 to positively restore and aline combs 2|U in normalpositions.

The above explanation indicates the operations and timing thereofoccurring during a zoning cycle or cycle of the zoning or transcribingsystem and which corresponds, when the card is being fed at normalspeed, to a card cycle point.

II'hese operations cause the transcribing means` under control of adesignation in a card column to transcribe and record the correspondingcharacter. v

As previously explained, the failure of any of lease by cam 220at about20 of the column i cycle (Fig. 21), to move forwardly above lift bail22|. As a result, during the zoning cycle, lever 2|8sp is effective tooperate lever IU-SP (Figs. 1 and 13) for-effecting intra-line spacing.

Intra-line space lock.-As already explained, when none of the combs 2|!!is actuated, lever 2 |8sp (Fig. 13) is normally free to move forward andoperate lever |Usp to cause intra-line spacing of the recording unitcarriage 24 (Fig. 6).

A gap of ten cycle points occurs between successive cards, during whichnone of the combs 2||l is actuated, the analyzing circuit line beingbroken by commutator CF-I (see Fig. 20) During each of thezoning cyclesor revolutions of shaft |23 occurring within said gap, when cam w 22|)releases lever 2|8sp, forward movement of the lever. while not blockednow by combs 2IIJ,

will be prevented by energization of magnet 230. It is also desired tolock the lever 2|8sp against operation if the main clutch is uncoupledduring any zoning cycle, particularly during a zoning cyclecorresponding to a cycle point occurring during the card reading period,1" to 30 of a card cycle.

The manner in which the magnet 23D is cncrgized, under above conditions,to lock the space lever 2|8sp will now be explained. The circuit formagnet 23D is as follows (middle of Fig. 23)

Space lock magnet circuit-From the left side. through line 3| througheither contacts R--Ba or the clutch arm contacts 62, through lift bailcontacts 235 (also sec Fig. 13), and space lock magnet 23u, to the rightside.

Contacts R-Ela are opened by coil R--S energized during the card readingperiod of a cycle by the previously traced Coil R-Q circuit. Betweencard reading periods, coil R-9 is deenergized, permitting contacts R-Sato close. Thus, the Space lock magnet circuit will be automaticallyestablished during the ten cycle point gap between successive cards orwhile the brushes SB are wiping the bare contact roll |31. During thisgap, shaft |23 makes ten revolutions and none of the combs 2 U isactuated. but lever ZIBsP remains locked by magnet 230 against operationby the lift bail 22|. In above manner, under control of contacts R-9a,intra-line spacing of the recording unit is prevented between cardreading periods.

If the main clutch is stopped, clutch arm contacts 62 make (see Fig. 19)and remain closed while the main clutch is at rest and while shaft |23continues to rotate and perform zoning cycles. As the main clutch is atrest, the card feed has been interrupted and during this period, thecircuit for magnet 23D forms through closed contacts 62. As indicated inthe zoning cycle chart (Fig. 21) the main clutch disengages at 80 oi'the zoning cycle or after the operations under control of thelast-analyzed card column have been completed. Lift bail contacts 2'35do not close till 90 of this zoning cycle. At this point. With contacts62 closed, the Space lock magnet circuit forms, energizing magnet 230 toprevent forward movement of lever 2|8sp above lift bail 22|. Thiscircuit remains in effect till '75 of the next zoning cycle, but by thenthe lift bail 22| has risen and, even if lever 2| 8sp were to moveforward, it would be too late for the shoulder 2|8a thereof to coactwith the lift bail. Thus, during the zoning cycle followingdisengagement of the main clutch, intra-line spacing is prevented. Aslong as the main clutch remains disengaged, contacts 62 stay closed andthe above locking action is repeated each zoning cycle. In above manner,when the main clutch is at4 rest and card feed has been interrupted,intra-line spacing of the record sheet on platen 2D is prevented undercontrol of clutch arm contacts i2.

Intermediate column carriage return code-- When an intermediate cardcolumn (between and 80 or 2 through 19) is punched with a carriagereturn code 12, the sensing of this code by the analyzing means formsthe previously traced 12 analysis circuit, energizing comb magnet 2|2|2, and relay coils R--4 and R-8.

AEnergization of comb magnet 2|2| 2 causes operation of lever 2|8CR(Figs. 7, 8, 10) in turn causing lever IU--CR (Fig. 1) to operate thecarriage return and incidental line spacing mechanism.

Coil R--8 closes contacts R-Sb to form the following circuit:

Coil R-3 circuit-From the left side, through zoning cycle commutatorHS-Z (see Fig. 2l),

line 3|6, normally closed relay contacts R-|6a and R-Za, contacts R-Bb,coil R-3, to right side.

Coil R3 closes contacts R-Ba to form a shunt circuit operative aftercontacts R-8b open 5 due to breaking of the analyzing circuit at about24 of the zoning cycle. This shunt circuit is as'follows:

Coil R-3 shunt- From the right side, through coil R-B, contacts R-Sa,left hand margin con- -10` tacts 33 (also see Fig. 15) to the left side.

Coil R-3 opens contacts lit-3b in the Main clutch magnet circuit,deenergizing clutch magnet 53 to stop card feed at 80 of the same zoningcycle (see Fig. 2l) in which the carriage re- 15 turn code was sensed.As the carriage return operation is effected, contacts 28 (Figli) alsoopen; causing an additional break in the Main clutch magnet circuit. Thecard feed will now stop until the carriage return mechanism returns tonormal to cause contacts 28 to reclose and until the left margin isreached, at which point lthe left margin stop extension 34a (Fig. 15)opens contacts 33, and the next line of the bill form is in position toreceive the transcription from the following card column. As contacts 33open, the stick circuit of coil R-3 opens, and contacts R-Sb reclose.With termination of the carriage return operation, contacts 28 alsoreclose, and as contacts R-3b have now closed, the Main clutch 30 magnetcircuit is reestablished, resuming card feed.

In above manner, spaced intermediate card columns may have carriagereturn codes to cause the date of a single card T to be transcribed onsuccessive lines of a bill form. It is to be noted, however, thatnormally, in the absence of an intermediate card column carriage returncode, all the data of a single record card will be transcribed on asingle line of a bill form.

4Normal carriage return- Following the passage ofthe last card column ofeach card past the analyzing means, a cyclic carriage return normallyoccurs, as follows: After the last card column has been read, commutatorCF--l (Fig. 20) breaks, opening the coil R-S circuit. As coil R-S isdeenergized, it permits the right side of transfer contacts R-Sb toclose,which occurs after the analyzing period of column 80. After theright side of contacts R9b close, commu- 50 tator CF-B (Fig. 20) makes.Commutator CF-l already has made, and when commutator CF-3 makes, thefollowing circuit forms (top of Fig. 23):

Coil R-26 circuit-From the left side, through 55 commutator CFL-4,contacts R-|a, normally closed R-Ib contacts, commutator CF-S, coilR-26, to the right side.

Coil Rf-2B closes contacts R26a, and with the right side of transfercontacts R-Sb already closed, the following circuit is established(upper part of Fig. 23)

Normal C. R. circuit-From the right side, through coils R-I, R8, combmagnet 2|2|2, the right side of contacts R-Sb, contacts R-26a, 65contacts R|a, commutator CF-4,and to the left side.

As a result of energization of magnet 2l2-|2,

a carriage return operation occurs. This normal, cyclic carriage .returnis eifected at the end ofthe card reading period, normally causing thedata of each card to be recorded on a separate line. As an incident tothe normal or cyclic carriage return, card feed is interrupted undercontrol of the coil R3 circuits, formed 75 0 anali/zing circuit-'Fromthe left side` through commutator CF-l, contacts Rf-lb, commutator HS-I,relay contacts R-I3b, contacts 63, common brush SB-c, contact roll |31,brush SB-O, normally closed zero elimination contacts R-25b, comb magnet2|2-O, coil R--24, and to the right side.

When a 0 code occurs alone in a card column outside the selectednumerical card eld or within the numerical field but after the firstsignificant digit representation, the above 0 analyzing circuit isestablished, causing the printing of the digit 0. It is desired,however, to prevent the formation of the above circuit when the 0 codeoccurs within the selected numerical card field but before the rstsignificant iigure designation of this eld. By preventing formation ofthe 0 analyzing circuit, the printing of the 0 by the transcribing andrecording means is prevented. Further, since the 0 analyzing circuit issuppressed, all the combs 2|0 remain in initial position, and as aresult, the lever 2I8sp is permitted to move forward, causing anintra-line spacing operation to occur. Thus, foreach column of anumerical card field bearing a 0 code preceding the column bearing thedesignation of the i'lrst or highest order significant digit, therecording of a 0 will be prevented and instead an intra-line spacingoperation will occur. Thenumbers in the selected, correspondingnumericaliields of successive cards arelisted by the recording apparatusone above another, due to the carriage return operation which occurs atthe end of each card cycle,

' as explained above. The numbers are thus recorded in lists, within apredetermined, vertical, numerical eld of the receiving sheet P, andthis field maybe considered as including denomina.-

- tional order columns, each corresponding to a denominational ordercolumn of the numerical card eld. As explained above, when the 0analyzing circuit is suppressed, the 0 digit is not printed in thecorresponding order column of the sheet P, but instead the sheet isspaced to bring the next order column thereof to printing position. Inthis manner, the numbers of the successive cards which are printed inlist form on the sheet P have their digits located in the properdenominational order columns along the list.

The zero elimination means is to prevent0 codes of selected numericalcard fields from being transcribed when such codes occur above thehighest order significant gure of the numerical field. The 0 codes,however, are to be transcribed when they are in columns of the numericalcard field following the column bearing the first significant figure.Further, since successive cards have correspondingly located numericalcard fields, the zero elimination means may come into play at the sametime during each of successive cycles, and this is effected undercontrol of the cyclically operating program drum |44. As previouslyexplained, clips |41 may be set on drum |44 (Figs. 16 and 17) to ridepast pinion |68 and turn the latter to cause contacts |12 to close foreffecting elimination of zero printing before the rst signiiicant digitof a numerical

